1
Published: 1971
Superior document: Kawashiri chiiki no chishitsu [Textbd.]
2
Published: 1971
Publisher: 地質調査所 / Chishitsu Chōsa sho
Superior document: Chiiki chishitsu kenkyū hōkōku : Akita (6) 41
3
Published: 1971
Superior document: Kawashiri chiiki no chishitsu [Karte]